Trulia said the addition of iPad and Android applications builds off a base of more than two million mobile users, who visited Trulia.com from their phones last month. That represents a more than 300 percent increase compared to the year earlier, it said.

Both the iPad and Android apps will be slightly different from what was being offered on the iPhone. The iPad app will use the larger screen real estate to display a color-coded heat map that examines the differences in average listing price and sold price within a city or county. The Android app will allow users to add open houses to their calendars and scan QR codes.

Zillow said with the addition of its BlackBerry app, it will now cover more than 90 percent of smartphone users. The Seattle-based company said its services are used on mobile devices more than 6.5 million times each month with 23 million visits to home detail pages.

In addition to being able to search the BlackBerry app for homes based on a user’s location, they will also be able to filter searches by price, number of bedrooms and bathrooms, and other information. Homes will be viewable in satellite or street view, and will feature color photos.

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